Math, asked by soumank3845, 10 months ago

Prove that Sin750. Cos480+cos120.cos60= -1/2

Answers

Answered by Harikishan678

6

Answer:

sin750.cos480+cos120.cos60

sin(720+30).cos(360+120)+cos120.cos(90-30)

sin30.cos120+cos120.sin30

2×sin30 cos120

2×(1/2)×(-1/2)

= -1/2

Previous Question

Next Question

Similar questions

English, 5 months ago

i have always helped my mother_____ (since) conjection ...

Social Sciences, 5 months ago

*When did the factories in England began to open?* 1️⃣ In the 1710s 2️⃣ In the 1720s 3️⃣ In the 1730s 4️⃣ In the 1740s...

Math, 5 months ago

find 16/⅔% of 32 please and fast...

Math, 10 months ago

Find the area of triangle ABC whose vertices are A (-5, 7), B (-4, -5) and C (4, 5).

Accountancy, 10 months ago

5. Explain in detail with reasons of what the sectors are or which type of projects is suitable for project finance?

Science, 1 year ago

cellulose ka meaning in hindi class 7 ...

Geography, 1 year ago

map skill for class 9th climate...

Math, 1 year ago

...Answer please Plot the points (-2,1), (Q(2,1), R(3,2) and S(-1,2) and write the name of the figure thus obtained.