Question

If A&B are complementary angles then its sin A=sinB or cos A=cos B​

Answer 1

Answer:

The correct option is (d) = sec A = cosec B

Two angles are said to be complementary if their sum is equal to 90° . θ & (90° - θ) are complementary angles.

Answer 2

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$\huge  \star\rm{ \red{Solution:-}}$

If A and B are complementary angles then , A + B = 90 degree . . . . 1 Hence sinA = sin 90 - B = cosB So sinA = cosB and cos A = cos 90 - B = sinB Hence cosA = sinB Now tanA = tan 90 - B = cotB and cotA = cot 90 - B = tanB