Home
Class 12
MATHS
If cos A + cos B = 2, then which of the ...

If cos A + cos B = 2, then which of the following is the value of cos (A + B)?`

A

1

B

0

C

-1

D

2

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC RATIOS OF COMPOUND ANGLES

    CHHAYA PUBLICATION|Exercise Very Short Answer type Questions|23 Videos

  • TRIGONOMETRIC RATIOS OF COMPOUND ANGLES

    CHHAYA PUBLICATION|Exercise Short Answer Type Questions|26 Videos

  • TRIGONOMETRIC RATIOS OF COMPOUND ANGLES

    CHHAYA PUBLICATION|Exercise Comprehension Type|6 Videos

  • TRIGONOMETRIC RATIOS OF ASSOCIATED ANGLES

    CHHAYA PUBLICATION|Exercise SAMPLE QUESTIONS FOR COMPETITIVE EXAMS - ASSERTION-REASON TYPE|2 Videos

  • TRIGONOMETRIC RATIOS OF MULTIPLE ANGLES

    CHHAYA PUBLICATION|Exercise Comprehension Type|6 Videos

Similar Questions

Explore conceptually related problems

Which of the following is the value of cos (-1170^@) ?

If cos A = sqrt 3/2 state which of the following is the value of cos 3 A?

If 2 cos theta = x + 1/x "state which of the following is the value of" cos 2 theta?

if in a triangle ABC, A ne B and a cos A =b cos B, then which of the following is correct ?

cos(A + B) cos (A-B) =

For real values of theta, which of the following is/are always positive? "cos"(costheta) (b) cos(sintheta) sin(costheta) (d) sin(sintheta)

If sin A +sin B =2, then the value of cos (A+B) is-

Which of the following is/are the value of "cos"[1/2cos^(-1)(cos(-(14pi)/5)]? (a) cos(-(7pi)/5) (b) sin(pi/(10)) (c) cos((2pi)/5) (d) -cos((3pi)/5)

Let ABC be an acute angled triangle with orthocenter H.D, E, and F are the feet of perpendicular from A,B, and C, respectively, on opposite sides. Also, let R be the circumradius of DeltaABC . Given AH.BH.CH = 3 and (AH)^(2) + (BH)^(2) + (CH)^(2) = 7 Then answer the following Value of (cos A. cos B . cos C)/(cos^(2)A + cos^(2)B + cos^(2)C) is

If sin A =sinB and cos A=cos B, then the value of A in terms of B is-