Math, asked by aditya25112003, 9 months ago

if A+B+C=270degree then cos2A+cos2B+cos2C=1-4sinAsinBsinC

Answers

Answered by abhi7485

3

Answer:

The expression above is wrong as the identity is only valid when A+B+C = 180° that is the three angles form a triangle.

Previous Question

Next Question

Similar questions

Math, 5 months ago

solve the following equation:5-3=20...

Physics, 5 months ago

state ohm's law. aaaaaaaaaaaassssssssssss...

Biology, 5 months ago

who store food and other nutritients...

Math, 9 months ago

the two acute angles of an obtuse angled triangle,whose obtuse angle measure 131digre, are in the ratio 2.5.Find the angles...

Biology, 9 months ago

the measure of Intelligence is the ability to...

Environmental Sciences, 11 months ago

How to overcome weather problems of agricultural drones?

Biology, 11 months ago

Photosynthesis in an aquatic plant was measured by counting the number of o2 bubbles coming out of the cut end of the plant . What will happen to o2 production , if you use a pipe yo blow air from your mouth into water in the breaker...

Physics, 11 months ago

Particle is moving with a speed = 30t^2 + 40 + 2 find average speed at t=0, t=5...