Question

prove
sin (A+B) : sin A .cos B + cos A .sin B​

Answer 1

Answer:

1 + cot2 θ = cosec2θ. (2) tan2 θ + 1 = sec2 θ. (3). Note that (2) = (1)/ sin2 θ and (3​) = (1)/ cos2 θ. Compound-angle formulae cos(A + B) = cos A cos B − sin A sin B.

Step-by-step explanation:

Answer 2

Answer:

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