Answer
Step by step text solution for 9sec^2A-9tan^2A is equal to (a) 1 (b) 9 (c) 8 (d) 0 by MATHS experts to help you in doubts & scoring excellent marks in Class 10 exams.
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RD SHARMA-TRIGONOMETRIC IDENTITIES-All Questions
- The value of (1+cottheta-cos e c\ theta)(1+tantheta+sectheta) is (a...
03:36
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- (tantheta)/(sectheta-1)+(tantheta)/(sectheta+1) is equal to 2tanthet...
02:47
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- (cos e c\ theta-sintheta)(sectheta-costheta)(tantheta+cottheta) is equ...
03:10
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- If x=acostheta and y=bsintheta , then b^2x^2+a^2y^2= (a)a^2b^2 (b) a ...
01:22
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- If x=asectheta and y=btantheta , then b^2x^2-a^2y^2= (a)a b (b) ...
01:17
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- (cottheta)/(cottheta-cot3theta) + tantheta/(tantheta-tan3theta) is equ...
02:40
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- 2(sin^6theta+cos^6theta)-3(sin^4theta+cos^4theta) is equal to (a)0 (...
04:30
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- If acostheta+bsintheta=4 and asintheta-bcostheta=3 , then a^2+b^2 = (a...
03:35
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- If acottheta+b"c o s e c"theta=p and bcottheta+a"c o s e c"theta=q , t...
03:15
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- The value of sin^2 29o+sin^2 61o is (a) 1 (b) 0 (c) 2sin^2 29o (d) ...
01:59
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- If x=rsinthetacosvarphi , y=rsinthetasinvarphi and z=rcostheta , then ...
02:47
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- If sintheta+sin^2theta=1 , then cos^2theta+cos^4theta= (a)-1 (b) 1 (c...
01:52
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- If acostheta+bsintheta=m and asintheta-bcostheta=n , then a^2+b^2= (a...
03:20
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- If cosA+cos^2A=1 , then sin^2A+sin^4A= (a)-1 (b) 0 (c) 1 (d) None of ...
02:05
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- If x=asecthetacosvarphi , y=bsecthetasinvarphi and z=ctantheta , then ...
02:22
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- If acostheta-bsintheta=c , then asintheta+bcostheta= (a)+-sqrt(a^2+b^...
04:27
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- 9sec^2A-9tan^2A is equal to (a) 1 (b) 9 (c) 8 (d) 0
00:58
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- (1+tanθ+secθ)( 1+cotθ−cosec θ )= (a) 0 (b) 2 ...
03:36
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- ( secA+tanA )( 1−sinA )= (a)secA (b) sinA (c) cosec A (d...
01:31
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- (1+tan^2A)/(1+cot^2A) is equal to sec^2A (b) -1 (c) cot^2A (d) tan^2A
01:20
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