Answer
Step by step text solution for Evaluate:cos 45 cos 60 - sin 45 sin 60 by MATHS experts to help you in doubts & scoring excellent marks in Class 10 exams.
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KALYANI PUBLICATION-TRIGONOMETRIC RATIOS OF CERTAIN ANGLES-EXERCISE
- Evaluate:cos 45 cos 60 - sin 45 sin 60
01:48
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- Evaluate:(cot 60)^2+(sin 30)^2-(cos 90)^2
01:58
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- Evaluate:(cot 30)^2-2(sin 30)^2-3/4(cosec 45)^2
02:39
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- Evaluate:(sin 30+tan 45-cosec 60)/(sec 30+cos 60+cot 45)
03:35
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- Evaluate:(cos 30+sin 60)/(1+cos 30+sin 60)
03:39
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- Evaluate:((sin 30)^2+(cos 45)^2-4(sin 30)^2)/(2sin 30 cos 30+tan 45)
04:10
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- Evaluate:((tan 60)^2+4(sin 45)^2+3(sec 30)^2+5(cos 90)^2)/(cos 30 +sin...
04:18
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- Verify:a.Sin60^@=(2tan30^@)/(1+tan^2 30^@)
02:30
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- Prove that:cos 60=(1-(tan 30)^2)/(1+(tan 30)^2)
02:40
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- Prove that:(tan 60-tan 30)/(1+tan 60 tan 30)=tan 30
02:39
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- Prove that:((1+cot 60)/(1-cot 60))^2=(1+cos 30)/(1-cos 30)
03:49
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- Prove that:((sin 0+sin 60)(cos 60+tan 45)/(tan 30+cot 60)(cosec 30-cos...
03:50
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- Prove that:((1+2sin 60cos 60)/(sin 60+cos 60))+((1-2sin 60cos 60)/(sin...
04:19
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- Prove that:(sec 30)^2-(2tan 30 cosec 60)/(1+(tan 30)^2)-(cot 30)^2=0
03:25
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- If A=60⁰ and B=30⁰ , verify that sin (A+B)=sin Acos B+cos A sin B
03:51
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- If A=60⁰ and B=30⁰ , verify that sin (A-B)=sin A cos B-cos A sin B
03:44
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- If A=60⁰ and B=30⁰ , verify that cos(A+B)=cos A cos B-sin A sin B
03:21
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- If A=60⁰ and B=30⁰ , verify that cos (A-B)=cos A cos B+sin A sin B
03:56
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- If A=60⁰ and B=30⁰ , verify that tan (A+B)=(tan A+tan B)/(1-tan A tan ...
04:59
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- If A=60⁰ and B=30⁰ , verify that tan (A-B)=(tan A-tan B)/(1+tan A tan ...
04:06
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