Question

if sin alpha + sin beta + sin gamma + sin delta = 4, then find the value of cos alpha + cos beta + cos gamma + cos delta

Answer 1

Answer:

ANSWER WILL BE 0

Step-by-step explanation:

Value of sin vary from

-1≤ sinФ≤1

so, here,

      sinα+sinβ+sinγ+sinδ=4

here it will only possible, if sinα=sinβ=sinγ=sinδ=1

                        or, α=β=γ=δ=90°

so, cosα+cosβ+cosγ+cosδ=0

            ( as cos90°=0)

it will absolutely help you!!!